The human eye

The eye is one of our most important sense organs. When stimulated by light, electric impulses are produced by its receptors.

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Patellar reflex

The reflex triggered by the stretching of the extensor muscle is the patellar reflex.

Donating blood

Donating blood can save lives, since patients often need various blood products for their recovery.

How do we hear?

This lesson helps you understand the process of hearing.

Human muscles

Skeletal muscles form the active part of the locomotor system: they move the bones they...

Parts of the human brain

The main parts of the human brain are the brain stem, the cerebellum, the diencephalon,...

Vitamins

How does our body gain access to the vitamins it needs?

Voice production

When producing sound, the vocal cords are vibrated by the air flowing out of the lung.

Oral cavity, pharynx and oesophagus

The first section of the gastrointestinal tract comprises the oral cavity, the pharynx...

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